CVE-2026-57432 Affecting perl package, versions <5.44.0-r0


Severity

Recommended
0.0
high
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
0.21% (11th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-PERL-18007831
  • published18 Jul 2026
  • disclosed13 Jul 2026

Introduced: 13 Jul 2026

CVE-2026-57432  (opens in a new tab)

How to fix?

Upgrade Chainguard perl to version 5.44.0-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perl package and not the perl package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

Perl versions before 5.40.5-RC1, from 5.41.0 before 5.42.3-RC1, from 5.43.0 before 5.43.11 have an integer overflow in S_measure_struct leading to an out-of-bounds heap read in pack and unpack.

S_measure_struct adds each item's size times its repeat count to a running total with no overflow check, so a large repeat count in a pack or unpack template wraps the signed SSize_t total negative. The @, X, and x position codes then guard their moves with a signed length comparison that passes when the length is negative, advancing the buffer pointer out of bounds.

A template derived from untrusted input can read heap memory past the buffer and return it to the caller.

CVSS Base Scores

version 3.1